Electromagnet.



PATBNTED JAN. 30, 1906.

F. B. COREY. ELEOTROMAGNET.

APPLIGATION FILED JULY 15, 1904 Witnesses- I nventor: Fred B. Cor y 4 nals to be held at safety by an electromag- UNI iii ADY, new roan; ASSIGNQR TO GENERAL A CORPORATION or new YORK.

Arne

Specification of Letters ]Patent.

ELECTROMAGNET- Patented Jan. 30, 1906.

Application filed July 15, 1904- .Serial No. 216,644.

To all whom it may concern: Be it known that I, FRED B. COREY, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Electromagnets, of which the following is a specification.

My invention relates to electromagnets, andis particularly applicable to electromagnets and solenoids for controlling semaphoresignals in railway systems, although it is not limited to this specific application,but may or to both of the signals.

be used with advantage wherever it is desired to operate two devices selectively'with a sin gle magnet.

The object of my invention is to so arrange the connections between an operating-magnet and two or more devices to be moved such, for instance, as semaphore-signalsthat either or both of the devices may be moved selectively by the magnet and that the selective action ma be controllable from a distance. I accomp ish this by providing two dogs arranged to be actuated by the magnet and adapted to engage the two sema-' phore-signals, but normally held out of engagement with the semap ore-signals by a spring or similar device. I also.v rovide a small selector magnet for each 0g which when energized moves the dog into engagevment with the signal or other device to .be moved. In this manner the actuating-mag net may be operatively connected to either Another feature of my invention consists in the arrangement and connection ofthe selector-magnets so as to enable both selector and actuating magnets to be operated with great economy of current. In block-signal systems it is customary to arrange the s1gnet and to allow t e signal to go to danger by gravity when he magnet is denergized. This arrangement insures safety in operation, since the disabling of the electric circuits can produceno. more serious effects than allowing the signals to go to danger, and thereby delay traflic; but since the magnets must normally be energized in order to hold their signals at safety a large amount of current is constantly re uired. In Patent No. 765,550.issued to WFiV. BrownJuly 19,1904,

isdisclosed a novel "form of electromagnet so arranged that a maximum current is required only While 'the signal .is being drawn to safety, while a much smaller current suffices' to hold the signal in safety position. One feature of my invention consists in so ar ranging the selector-magnets that they may housed in connection with such an actuatingmagnet and have the current reduced in their windings when the signal is set without letting the signal fall;

My invention will best be understood by reference to the accompanying drawings, in ,which* Figure 1 shows connections arranged in accordance with my invention between the oberating-1nagnet and two signal-rods. Fig. 2 shows a plan view of a portion of said connections, and Fig. 3 shows diagrammatieally the arrangement and connections'of the circuits of the magnet-windings.

In Fi 1 I have shown an operating-mag net of t e type disclosed in the above-mew tioned patent, No. 765,550. This magnet consists of an actuating-coil A, which when energized draws up the movable core B into the position shown in the drawings. Core B has at its lower end aslot b, which is loosely yet positively engaged by a pin 0, carried by the lever C, which is pivoted at c. D is a dash-pot adapted to retard the upward movement of lever C under the influence of core B. The movable member, outside member, attached to lever C, carries a lug d, which encircles an upright shaft E. The shaft E carries washers e and e, adapted to be engaged respectively by lug d upon the upward-and-downward movement of the movable member of dash-pot D. F is a bridging member of conducting material, such as a metal disk, and is carried at the upper end of vertical rod E. Bridging member F when'rod E is allowed to fall engages the contacts f f is a spring which against the tapered insulating-block j"-', carried by shaft E, and which holds shaft E 1n any given position. Gris a dog or catch pivoted at g on lever U and adapted to engage the pin g when lever (I is in its raised pose tion, as shown in Fig. 1. g is a spring aeting to hold dog G in engagement with the nn y. As long as dog G is in engagement with -to, as well as the movable member of dashthen cut out or pin g it serves to support the weight of lever C and the signal mechanism connected therepot D, end thereby relieves core B of any downward s ain thereon.

The ones ion of mechanism as time iar described is follows: If the core B and lover C are at their lowest positions and coil is is energized, core B will be drawn up, moving lever C and dash-pot D upward until the lug I, carried by the dash-pot D, engages the collar e and raises the bridging member F out of engagement with the contactsf hen this occurs, a resistance is thrown into series with the actuating coil A, will be hereinafter explained, and the current-flow through actuating-coil A is reduced to an amount insufficient to hold up the weight of lever end attached mechanism. Lever C and dash-pot D accordingly drop back a small amount, sufficient to bring dog into engagement with the pin g, as shown in Fig. 1. Pin g then takes the weight of lever C and the mechanism connected thereto, while the current flowing through coil A is still sufficient to hold up the weight of core B alone, Core and lever C are consequently maintained in the position shown in Fig. l, and springf holds bridgin member F raised out of. engegement wits contacts ff. This condition of aliairs continues as long as coil A remains energized. When the circuit of coil A is opened, core B falls freely until the upper end of slot 72 engages pin c and in falling strikes the toe g of dog G, rot-etingit on its fi st against the pressure of spring 9' end releasing it from engagement with pin 9. Lever C consequently Iells, allowing the signal to go to danger? Just before reaching its lowest position lug (Z, carried by dash-pot D, engages the washer of collar 5 on shaft E and pulls dov ii bridging member F into engagement with contacts ff The resistance is the circuit of coil A, as will be hereinafter explained, and the coil is ready to receive its maximum current, when the circuit of the coil is again closed.

The arrangement as thus far described is oil: cisclosed in Fetent N o. 765,550, above of lied to, and has been described here merely for the purpose of enabling a clear understanding. of my invention to be obtained. The outer end of the leyerC carries two piv- H and ii. One end of dog H carries a core, such as h, adopted to be pulled downward by a selector-coil'l, and the other end is adapted to engegeianotch j in the operating-rod J of a signal or other device to be moved. T

.lhe dog 11 normally held out of engagement with rod 5 by a tensio'u-springK; but 1. 1 coil 1 is energized the dog is rocked on its pivot egeinst the tension of spring K, so es to bring i s locr end into engagement 7 is similerly'proyided If m: 1 1 .1 1-. its roe 5. Tee cog explained. The relays .L L"are .sl1own con- .nected, through switchesS and S ,"to any suitable source of current.

These relays may be controlled manuall from a signalhouse or may be connectedm a track-circuit so as, to operate like the relays in an ordinary automatic block signal sents a source of current or the operatln coil A controlling the two signals N and The coerse-wire-sections of the selector-magnets 1 and I have one terminal connected to the relays Land L and the other terminals connected to contacts f. The fine-wire sections are similarly connected to therelays, but have their other terminals connected to the resistance 0, which is thrown'into series with coil A; when the bridging member .F is raised in the manner that has been heretofore explained. The other terminal of coil A is shown grounded by connection to one of the track-rails R. With both relays L and L open the circuit of both the selectormagnets 1 and l" and of the actuating-coil A are open. The core of coil A is consequently at its lowest position and bridging member I is inen agement with the contacts f. Now if reley L is energized, as indicated in the drawsystem; M repreings, a circuit is closed from the line M through the armature of relay L, through the coarse-wire section of selector-magnet I, through bridging member F, and throu 11 actuating-coil A to earth. The do H (s own in Fig. 1) is consequently broug t into ongagement with the operating-rod J of the signsl N, and coil); draws up its core, moving signal N to safet j'position. Whenthis; osition is reached, ridgingmember F is llfted out of engsgementmth contact f, as has been already described, and the connection between the coarse-wire section of coil I and ac .tueting-coil A is broken. The circuit now passes from the armature of relay L through the fine-wire section of relay 1, through resistance O, end through actuating-coil A. The current in both the actuating-coil and the selective devicjefi's-consequentlyreduced, so that the greatest economy of current'is ob- I'IO tcined, while the number of effective turns of sential to my invention.

saietyposition and signal N left at dan er, Thus the selective control of both signals by a single actuating-coil is obtained.

In order to present a complete description of my invention, I have illustrated and described a number of parts which are not es- Consequently I do not desire to limit myself to the particular construction and, arrangement of parts shown, but I aim in the appended claims to cover all such modifications which are within the sec e of my invention.

What claim as new, and desire to secure by Letters Patent of the United States, is

l. In combination with a plurality of devices to be moved, an actuating-rnagr1et, a lever controlled by said magnet, a plurality of dogs carried by said lever, and selective means for moving said dogs into engagement with said devices.

2; In-coinbination with a plurality of devices to be moved, an actuating-magnet therefor, a lever controlled by said magnet, a

plurality of selector-magnets carried by said ever, and means controlled by said magnets for connecting said lever selectively to said devices.

3. In combination with a plurality of devices to be moved, a magnet-winding, a lever arranged to be actuated thereby, a plurality of dogs carried by said lever and adapted to engage said devices, means for holding said dogs normally out of engagement with said devices, and"selectormagnets adapted and arranged to move said dogs selectively into engagement with said devices.

4. In combination with a plurality of sig nals, notched operating-rods therefor, a sinle actuating-magnet for said rods, a plurality of dogs arranged to be moved by said magnet and adapted to engage the notches on said rods, means for holdin said dogs normally out of engagement wit said notches, and selector-magnets adapted and arranged to move said dogs selectively into engagement with said notches.

In combination with a plurality of de vices to be raised, a single actuatmgmagnet therefor, selector magnets contro ling the connections between sa d devices and said actuating-magnet and each comprising a coarse section and a fine-wire section of a greater number of turns, means for connecting the coarse-wire section only in circuit for ralsing, and means for connecting the fine-wire section in circuit when the device or devices are raised.

6. In combination with a plurality of devices to be raised, a single actuatin -magnet there-for, selector magnets controIling the connections between said devices and said actuating-magnet,means for reducing the current-f ow in said magnets when the device or devices are raised, and means for increasing the number of effective turns of the selectormagnets.

7. In combination with a plurality of devices to be raised, a single actuatin -niagnet therefor, selector magnets contro ling the connections between said devices and said actuating-magnet, means for connecting said magnets selectively in series with the actuating-magnet for raising a device or devices, and means for decreasmg the current-fiow in the magnet-circuit and increasing the effective turns in the selector magnet or magnets when said device or devices are raised.

vices to be raised, a single actuatin magnet connections between the several devices and the actuating-magnet, each of said selectorma nets comprising a coarse-wire section an a finawire section of greater number of turns, means for connecting the coarse-wire sections of said magnets selectively in series with said actuating-magnet for raising a device or devices, and means for inserting a resistance inthe magnet-circuit and inc uding said tine-wire sections in circuit when said device or devices are raised.

9. In a railway si nal system, a plurality BENJAMIN B. HULL, HELEN Onronn.

therefor, selector-magnets contro ling the 8. In combination with a plurality of deof semaphore-signer s, a single actuating- 

